A time stamp is a time value that is associated with a data value. False True TRUE ANSWER : ? YOUR ANSWER : ?
A good identifier is which of the following? One that can change over time Can be null One that is unique Be intelligent TRUE ANSWER : ? YOUR ANSWER : ?
When the minimum and maximum number of instances of an entity is one, you know which of the following? Mandatory one Optional one Mandatory many Cannot tell TRUE ANSWER : ? YOUR ANSWER : ?
A relationship is an association representing the interaction between attributes. False True TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following conditions should exist if you want to convert a relationship to an associative entity? The resulting associative entity has an independent meaning. Some of the relationships for the participating entities are 'many'. The resulting associative entity has no attributes. All of these TRUE ANSWER : ? YOUR ANSWER : ?
A strong entity is an entity whose existence depends on some other entity type. False True TRUE ANSWER : ? YOUR ANSWER : ?
A ternary relationship involves how many entities? 3 or more 3 or less 3 More than 3 TRUE ANSWER : ? YOUR ANSWER : ?
A binary relationship is which of the following? An attribute with two different relationships A relationship between two entities A relationship between two attributes An entity with two different relationships TRUE ANSWER : ? YOUR ANSWER : ?
Some business rules cannot be represented in common data modeling notation. False True TRUE ANSWER : ? YOUR ANSWER : ?